Question 38 - The terminal velocity of a falling object, v is given by v = sqrt [ 4g (R - r) D / (3Cr) ] where sqrt is the square root of, g = 9.81, D = 0.000208, R = 1800, r = 994.6, m = 0.000893. The Reynold number, L is given by L = rD (v) / m. The C for various conditions are : C = 24 / L for L < 0.1; C = 24 (1 + 0.14 L^0.7) / L for 0.1 <= L <= 1000; C = 0.44 for 1000 < L <= 350000; C = 0.19 - 80000 / L for 350000 < L. Find the value of v for the situation above by trial and error, ^ is power, <= is less than or equal to.
- 1 Answers
- 1790 Views
- I also Faced
- E-Mail Answers
Answer Posted / kang chuen tat (malaysia - pen
Answer 38 - By trial and error, v = 0.016425. Excel function of program (Insert Function) in FORMULAS could be used to find a suitable value of C. Excel (Goal Seek : What-If-Analysis) in DATA could perform iteration on v. The answer is given by Kang Chuen Tat; PO Box 6263, Dandenong, Victoria VIC 3175, Australia; SMS +61405421706; chuentat@hotmail.com; http://kangchuentat.wordpress.com.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Explain how can one quickly estimate the additional pressure drop to be introduced with more tube passes?
Explain the common failure mechanism for above ground atmospheric storage tanks?
What are the apt definitions for apparent power, active power and reactive power?
What is a cstr and what are its basic assumptions?
Are there any general rules for flushing slurry lines?
Explain what types of valves are recommended for slurry services?
How can hexavalent chromium be removed from aqueous waste streams?
How can you estimate a gas flow based on two pressure measurements?
How can we derive power factor equation p=vi cos phi?
Explain why is post-weld heat treatment (stress relieving) sometimes necessary for welded vessels?
Are there flow velocity restrictions to avoid static charge build up in pipelines?
How can you quickly estimate the horsepower of a pump?
While there, are many tests available to detect leaks on vessels, is there a technology available to quantify the leak, or measure the flow through a leak?
Name some common problems associated with dense phase pneumatic conveying?
Explain what is the method involved in analyzing powders for composition?
